What Petrol To Use

What Petrol To Use

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bad company

Original Poster:

18,543 posts

266 months

Saturday 22nd September 2018
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Hi all.

I run a 2017 540i x-drive. I’ve been running it on Shell 95 Ron as I thought the V-Power was a waste of £’s. In today’s Telegraph Honest John column he’s recommending V-Power for a guy with a 2 litre Jaguar XE. It’s in the paper today but not yet online.

Any thoughts?

fxman

69 posts

79 months

Saturday 22nd September 2018
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Go for it if you have the cash. Review way forward if cash becomes a concern once more.

I have always used ASDA petrol. I find it quite performant on London's 20mph roads.

Dave.

7,358 posts

253 months

Saturday 22nd September 2018
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Double points on VPower too rotate

What does the handbook say to use?

av185

18,503 posts

127 months

Saturday 22nd September 2018
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95 Ron is fine.

Eddieslofart

1,328 posts

83 months

Saturday 22nd September 2018
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My M4 lives on a diet of 95 without issue. If i track it, it will get a tank of 98.

4rephill

5,040 posts

178 months

Saturday 22nd September 2018
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It will adapt itself to either fuel without an issue, so it's really down to personal choice at the end of the day.

The way I look at it, if you only use the car for trundling around town, with very little out of town driving - Run in on standard unleaded.

If you do more driving out of town, and performance is more important to you than economy - Run it on super unleaded.

(Saying that, despite the extra cost, I always run my car on super unleaded regardless. The one time I decided to use standard unleaded, 3 days later the crank sensor failed! BMW said it was totally unrelated to the fuel, and just a coincidence, but I told them: "No!, she knew I'd filled up with the cheap fuel and got her own back on me, making me pay for it!". From the next tank onwards I only ever used super unleaded, and have had no engine issues since! hehe )

bad company

Original Poster:

18,543 posts

266 months

Saturday 22nd September 2018
quotequote all
I just filled up and couldn’t bring myself the extra 10p per litre or £5.50 in total. I use the car for motorway runs and locally just for shopping etc. I do love the power though.

I always put V-Power in my TVR Chimaera 500.

Wills2

22,782 posts

175 months

Saturday 22nd September 2018
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I tried 95 ron but my mpg dropped so much it made the good stuff worth paying for, less power poorer mpg not great benefits.




Pica-Pica

13,753 posts

84 months

Saturday 22nd September 2018
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I had an E36 I-6 for 19 years. It could run on 91 to 99. For that car the V-power/Nitro was definitely better. It gave an extra 2mpg, so that paid for the extra cost, but it was also more powerful, smoother, and with better pick up. I would occasionally go back to 95 for a while, and then up it to 98/99 to re-check, it was always better on the 98/99. Just test it yourself and see.

CSLchappie

436 posts

204 months

Saturday 22nd September 2018
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I've pretty much always used 95 ron on all my previous cars, however after about six months of ownership of my current 340i I thought I'd give super a go, comparing long term MPG on 95 and 98, on average the 98 is around 7% more efficient for a full tank of fuel (I generally get 370-380 miles from a tank between fills) When I filled up today at Sainsburys (pretty much where I always go, the nectar points pay for the xmas booze) super was 5p more, so about 4% more expensive than 95 ron.

For me running the car on super is marginally more cost efficient, I haven't really noticed any difference in performance.

Mr Tidy

22,260 posts

127 months

Sunday 23rd September 2018
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My Z4 Coupe threw up an amber EML so I took it to my BMW Indy for a diagnosis and it was pre-cat codes.

He cleared them and gave it a dose of Cataclean with a follow-up dose 6 months later and it's been fine since that - but he did recommend using "super-plus" which is all mine has had for the last 18 months or so, and thankfully no issues since!

He only ever uses "super-plus" in a petrol BMW, so that's what mine get now. laugh

ManOpener

12,467 posts

169 months

Sunday 23rd September 2018
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Same engine as in the various other x40i flavours of BMW. I'd run it on Super to be honest- I've always seen a slight improvement in economy (2-3mpg) that usually offsets the additional cost.

tjlees

1,382 posts

237 months

Sunday 23rd September 2018
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It’s either the fuel engine cleaner at £20 every 2 months (archoil is one of the better ones) to minimise having carbon build up/walnut blasting/injector probs or V-power/bp equivalent. It works out to about the same for me on the man maths

I’ve gone for the latter, given the driver’s card gets me £15-17 off every 3 months/freebies and it’s easy.

There is an improvement in fuel consumption (about 30-40 miles on the 3l diesel), which is more due to keeping the carbon desposits down on my diesel and probably cleaning and more power on the petrol.

A comprise would be Vpower every alternate tank to keep the fuel cost down - I do this on OH petrol car.

gizlaroc

17,251 posts

224 months

Sunday 23rd September 2018
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540i will cost more to run on 95ron than it will on 98ron as it has a knock sensor and is mapped for 98ron.

You can put 95 in it, but it will retard the timing to stop it knocking, and you lose a fair bit of power and also MPG.

I use Tesco 99 now as it is as cheap as Shell 95.

My 335i was down 30hp on 95 ron compared to 98ron, proved on a rolling road.

My consumption on 95 was just a smidge under 25mpg, on 98 ron it was just under 28mpg. This was repeatable, every time my missus put 95 in you could feel the lack of bite on the car and sure enough you could not get the MPG above 25. I used to do the same run over a tankful every 4 days, so easy to test.



Recommendation on the filler cap is always the lowest you can put in, so will say 95ron, however if you read your manual it states "Output and consumption figures apply to RON 98 fuel".

Why buy a car like a 540i and throw away 30+ BHP for the sake of a fiver?

People used to spend 10's of thousands of pounds to get 30hp gain on petrol cars, you can have it for a few quid each week.

gizlaroc

17,251 posts

224 months

Sunday 23rd September 2018
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Here you go, rolling road on 335i with 95 vs 98ron.

Also shows it when mapped too.


gizlaroc

17,251 posts

224 months

Sunday 23rd September 2018
quotequote all
One other thing to mention, if swapping to 98, run your tank to nearly empty first, otherwise it could take two tankfuls to get the car to run on the 98 map. Probably will anyway.

Add a 1/8th of a tank of 95 to 98ron though and it is immediate.

msej449

177 posts

121 months

Monday 24th September 2018
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If you look at the many threads on this, especially on M and M Performance models, there seem to be two reasons why people opt for V-Power: power and cleaning. If you read the Shell material, then the power claims are very carefully phrased, but the cleaning claims are pretty direct and specific. So if you believe what Shell says, then keeping your performance engine clean seems to be the main reason, with a bit of extra performance thrown in as icing on the cake.

People understandably also approach the choice differently across the spectrum from those who (a) lease because the job needs a car, does a high mileage and gets replaced every 3 years all the way to (z) bought their performance car from new, outright, don't necessarily do a high mileage, and intend to keep it for a long time. With various combination inbetween.

You can consider it all a conspiracy, with the V-Power advantages just smoke and mirrors. It's pretty impossible to do anything like a systematic and consistent comparison of standard vs V-Power. Shell claim they do 2-engines-side-by-side long-term comparison bench tests that justify their claims.

Personally, I believe what Shell claims for V-Power cleaning advantages and given I bought my M235i from new and intend to keep it indefinitely, I'm prepared to use V-Power for the cleaning properties alone. If it gives slightly better performance, that's nice, but 330BHP in a 2 Series chassis is hardly under-powered for public roads anyway.

bad company

Original Poster:

18,543 posts

266 months

Monday 24th September 2018
quotequote all
gizlaroc said:
Here you go, rolling road on 335i with 95 vs 98ron.

Also shows it when mapped too.

That looks pretty conclusive.

gizlaroc

17,251 posts

224 months

Tuesday 25th September 2018
quotequote all
msej449 said:
If you look at the many threads on this, especially on M and M Performance models, there seem to be two reasons why people opt for V-Power: power and cleaning. If you read the Shell material, then the power claims are very carefully phrased, but the cleaning claims are pretty direct and specific. So if you believe what Shell says, then keeping your performance engine clean seems to be the main reason, with a bit of extra performance thrown in as icing on the cake.

People understandably also approach the choice differently across the spectrum from those who (a) lease because the job needs a car, does a high mileage and gets replaced every 3 years all the way to (z) bought their performance car from new, outright, don't necessarily do a high mileage, and intend to keep it for a long time. With various combination inbetween.

You can consider it all a conspiracy, with the V-Power advantages just smoke and mirrors. It's pretty impossible to do anything like a systematic and consistent comparison of standard vs V-Power. Shell claim they do 2-engines-side-by-side long-term comparison bench tests that justify their claims.

Personally, I believe what Shell claims for V-Power cleaning advantages and given I bought my M235i from new and intend to keep it indefinitely, I'm prepared to use V-Power for the cleaning properties alone. If it gives slightly better performance, that's nice, but 330BHP in a 2 Series chassis is hardly under-powered for public roads anyway.
The fuel company can't claim more power though, only the car manufacturer can do that.

You will only see gains if your car is set up for 98ron.

This isn't snake oil, it isn't some myth, if the car is set up to take advantage of 98 ron you will see a drop off in performance and mpg if you run it on 95ron.

Your car will lose around 30hp if you run it with 95ron.
This is discussed at length on the German forums, mainly because they can get 102ron over there too, all the tests show that 102ron quietens the engine and smoothes it out more, but unless you have a custom map to take advantage of it (often sold by race tracks where custom maps can take advantage) there is not power or MPG gain, like the jump from 95 to 98 ron.



The confusing thing is often the UK websites don't say the car is set up for 98 ron.
My E350 is a good example, UK site says unleaded, German site says Super Benzin Plus (89ron).




aeropilot

34,526 posts

227 months

Tuesday 25th September 2018
quotequote all
bad company said:
Hi all.

I run a 2017 540i x-drive. I’ve been running it on Shell 95 Ron as I thought the V-Power was a waste of £’s.

Any thoughts?
On the same basis then buying a 540i was equally a waste of money, when you could have bought a 520i instead..... wink


I only ever ran my previous 135i on V-Power in the 6 years I owned it, to run it on 95 is like buying a dog and barking yourself....

The only time I ran mine on 95 was when the petrol tanker drivers went on strike and for a couple of weeks the V-Power pumps were dry, and the car ran noticeably worse on 95, and it averaged about 2mpg worse over the same period.